I've been on this forum and others for over 11 years and have never heard of this doctor as a DS surgeon. I tried to find info online as to what procedures he does and couldn't find it.
There are some surgeons these days doing an operation that they are calling "the DS" but it isn't the DS. The real DS is a standard of care bariatric surgery, and has been considered standard of care for over 25 years. There is a new variation on the DS being called a variety of names - SIPS aka SADI aka loop DS - but it is experimental. The long term excellent results of the DS are well documented, both for weight loss and also for permanent resolution of type 2 diabetes. The long term results of this newer operation are not yet known. In addition, some surgeons are using the code for the DS to get insurance coverage (even though it's a different operation) and others are cobbling together other codes to get coverage. Some surgeons are very honest about what operation they are doing, others are not.
I have no way of knowing which operation your surgeon does, it just worries me that I've never heard of him as a DS surgeon. The DS community is small enough that those of us who are active in this community know who the DS surgeons are. Of course, if he has added the DS to his practice, that would be great. We need more DS surgeons! But I think it would be wise to learn more about the difference between these operations and ask specific questions about what he is planning for you. And, if you are not happy with the answers you get, go elsewhere. There are some good threads about the new operation on this website.
Please understand that I'm not saying he's not a good surgeon. He may be an excellent surgeon. But that won't matter if you don't get the operation you need.